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0.25ct Diamond (Marquise, 6.54×3.27mm, White) vs 4ct Emerald (Emerald, 11.56×8.56mm, Green)


Quick summary: When looked from above (face-up position), 4ct Emerald (11.56×8.56mm, emerald cut) appears 6.1 times larger than 0.25ct Diamond (6.54×3.27mm, marquise cut). See below how they compare side-by-side on a ring and finger.

0.25ct Diamond (marquise cut)
vs
 4ct Emerald (emerald cut)
white
 
green
6.54×3.27 mm 11.56×8.56 mm
actual size
Actual size of 0.25ct Diamond (marquise cut, 6.54×3.27mm, White color)   Actual size of 4ct Emerald (emerald cut, 11.56×8.56mm, Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 0.25ct Diamond (marquise cut, 6.54×3.27mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 4ct Emerald (emerald cut, 11.56×8.56mm) on a right ring and finger
Your settings
Ring
 Gold
Skin tone
 Light
Ring diameter
 16.9 mm
Ring width
 3.0 mm
Finger length
 64 mm
Finger coverage
 20% vs 51%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.25ct Diamond Marquise (6.54×3.27mm, White) and 4ct Emerald Emerald (11.56×8.56mm, Green) as they would appear on a ring and finger. Adjust the ring and finger size to get an idea of how these gemstones would look on your finger.

Where to buy?

For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile

Face-up Size

All things being equal, Diamond will face-up smaller than Emerald for a given carat weight, because it has higher specific gravity (3.52 vs. 2.72 - this means it's "heavier" compared to Emerald of the same size). Face-up size also depends heavily on the proportions of the cut.

Face-up area is a measure of the size of the gem when viewed from above (as set in a ring). It tells you how big the gem is at the girdle plane.


0.25 Ct Diamond (Marquise) 4 Ct Emerald (Emerald)
6.54×3.27 mm vs 11.56×8.56 mm
15.18 mm²   92.03 mm²
Face-up size outline for 4ct Emerald (11.56×8.56mm, emerald cut)
Face-up size outline for 0.25ct Diamond (6.54×3.27mm, marquise cut)
0.25ct Diamond Marquise (6.54×3.27mm)
4ct Emerald Emerald (11.56×8.56mm)
Difference: 506% (76.85 mm²)
4ct Emerald (Emerald, 11.56×8.56mm) has approx. 506% more face-up area than 0.25ct Diamond (Marquise, 6.54×3.27mm). In other words, it's 6.06x larger.


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